Any small wind turbine with fixed pitch blades can only operate best within a fairly narrow band of wind speeds. Operation outside those speeds is either not efficient or may over task the alternator without a furling mechanism that dissipates energy. Some small turbines are designed to shut down production above 25-30mph in order to preserve the alternator, reduce blade noise or dissipate heat, yet this is the speed where the available energy is greatest. Both LAKOTA and Longbow model alternator windings are designed to operate efficiently within 2 specific ranges of average wind speeds. LAKOTA turbines have 2 recommended winding settings that should be matched to the class of wind found at the site. The LAKOTA and Longbow are normally shipped in MOD 0. Under low wind conditions, where the site only occasionally experiences 20+ mph wind you may consider changing to MOD 3. Optimum energy production will normally be achieved by using MOD 0 for most sites.
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